Huawei NetCol5000-A021 User Manual page 167

NetCol5000-A021 In-row Air Cooled Smart Cooling
Product
User Manual (208 V)
Alarm Alarm Name
ID
a055 Discharge temp
sensor fault
a056 Discharge
pressure sensor
fault
a057 Comp discharge
HP
a058 Comp discharge
Issue 03 (2020-01-10)
Alarm Impact
Severity
Major The alarm is
generated.
Major The alarm is
generated.
Major The alarm is
generated, and
the compressor
is shut down.
Critical The alarm is
generated, and
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6 System Operation and Maintenance
Possible Causes Solution
port of the
control board is
faulty.
1. The cables to 1. Check the cables to the
the temp sensor
are loose or
2. Maintain or replace the
damaged.
2. The temp
sensor is faulty.
1. The cables to 1. Check the cables to the
the press sensor
are loose or
2. Replace the press sensor.
damaged.
2. The press
sensor is faulty.
1. The outdoor 1. Check the outdoor unit
unit input
power has an
2. Check the signal cables to
open phase,
incorrect phase
3. Clean the condenser fins.
sequence, or is
4. Maintain or replace the
unavailable.
2. Signal cables to
5. Check cables to the high
the outdoor unit
are not properly
6. Maintain or replace the
connected.
3. The condenser
7. Maintain or replace the
fins are
blocked.
8. Decrease certain amount of
4. The outdoor fan
driver or fan is
9. Reinstall the outdoor unit
faulty.
5. Cables to the
high pressure
switch are not
properly
connected.
6. The high
pressure switch
is faulty.
7. The EEV is
faulty.
8. The refrigerant
is overfilled.
9. The outdoor
unit is installed
improperly.
The a057 comp Reference to the solutions for
discharge HP the a057 comp discharge HP
temp sensor.
temp sensor.
press sensor.
power supply.
outdoor unit.
outdoor fan drive or fan.
pressure switch.
high pressure switch.
EEV.
refrigerant.
properly.
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